CN104979602A - Battery box and method for dynamically adjusting battery box pressing force - Google Patents
Battery box and method for dynamically adjusting battery box pressing force Download PDFInfo
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- CN104979602A CN104979602A CN201510272599.9A CN201510272599A CN104979602A CN 104979602 A CN104979602 A CN 104979602A CN 201510272599 A CN201510272599 A CN 201510272599A CN 104979602 A CN104979602 A CN 104979602A
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- battery
- lower box
- battery pack
- airduct
- regulator board
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The present invention provides a battery box and a method for dynamically adjusting the battery box pressing force. According to the present invention, a dynamical pressing mechanism mainly comprising a pressing plate, a spring, distance sensors, a pressure adjusting plate and a motor is controlled by a control system, such that the position limitation fixation of the battery monomer is reliable, the occurrence of the battery unit layering during the use process is prevented, it can be ensured that the battery pack always works under a suitable pressure, the battery box safety is ensured, and the work efficiency and the service life of the battery pack are effectively improved; and further a wind cooling system mainly comprising a fan and a wind pipe having non-uniform wind outlet hole density is arranged, such that the support and the cooling can be provided for the battery pack, the stability of the adjusting result of the dynamical pressing mechanism can be improved, the adjusting frequency can be reduced, the safety, the uniformity and the equilibrium of the battery box are ensured, the battery box can safely operate under the conditions of high capacity, high power, high voltage and high current charge, and the service life of the battery box is prolonged.
Description
Technical field
The present invention relates to power technique fields, particularly relate to a kind of method of battery case and dynamic adjustments battery case thrust.
Background technology
Along with the progress of science and technology and the enhancing of human environment protection consciousness; green energy resource industry both domestic and external has entered the stage of high speed development, carbon is used for negative pole, lithium-transition metal composite oxide is used for positive pole and carbonate mixture is used for electrolytical lithium-ions battery being widely known by the people.In the lithium-ions battery with this configuration, because carbonate can obtain higher voltage to being stable the oxidation of water and other organic solvents and reduction, therefore the energy density larger than the Ni-MH battery as aqueous batteries (water-based battery) and higher capacity can be obtained.The consumer electronics industries such as therefore electric motor car industry and notebook computer, mobile phone, video camera, digital camera and some special trade all start to use the powerful lithium ion battery of high-energy as power supply widely, and the encapsulating structure of the weight ratio of power module formed lithium ion battery, volume ratio, fail safe, battery pack and production efficiency etc. are had higher requirement.
Lithium electron ion battery power is formed by multiple lithium-ion battery monomer assembled package.In the production of Large Copacity, high-power lithium ion power supply, normally battery cell is carried out tandem compound and realize high pressure, battery cell is carried out parallel combination and improve capacity.Wherein, battery cell, according to the difference of housing, has aluminum hull/box hat battery and soft-package battery two kinds.It is good that aluminum hull/box hat battery cell has intensity, the advantage of outside simple and convenient assembly, but its plasticity is not as good as polymer flexible packaging lithium ion battery, when inside produces a large amount of gas, because shell rigidity can not discharge internal gas more by force, the security incident such as easily set off an explosion.Flexible packing lithium ion battery monomer has flexible design, and security performance is good, and heat-conductivity conducting performance is good, and adaptive temperature is wide, can the advantage such as high current charge-discharge, and substantially solves safety and life problems, becomes at present for making the first-selected product of large power supply.But, apply the power supply that flexible packing lithium ion battery monomer is formed in prior art, there is following problem:
1, safety issue: the external packing due to flexible packing lithium ion battery monomer is one deck aluminum plastic film; whole monomer is softer; when monomer is stacked, the compactibility of battery is lower; so cause the packaging film of each monomer to be easy to be punctured; battery security; how available protecting battery core packaging film is intact and ensure the compactibility of battery; battery pack fail safe is improved, the emphasis difficult problem making battery pack safe operation under the condition of Large Copacity, high power, high voltage, high current charge-discharge become pack structural design will to solve from the encapsulating structure of battery pack.
2, heat dissipation problem: in the high current charge-discharge course of work, due to the heating of battery, the accumulation of heat of battery pack, battery consistency can be caused to reduce, battery produces and expands, have impact on battery rear each battery with two side terminals and balanced important indicator in groups, thus reduce the cycle life of battery.How effectively to improve soaking performance and the heat dispersion of battery pack, become another emphasis difficult problem that pack structural design will solve.
3, discharging efficiency problem: suffered pressure time battery operated has considerable influence to its discharging efficiency, when battery works under a certain specified pressure, its discharging efficiency can reach peak value, and the assembling of the intraware of existing most of battery modules is normally fixed, especially pressure strip is fixing, relative constancy pressure is applied with to being stacked on each inner battery unit, and this pressure provides when usually being manufactured by battery unit manufacturer, to prevent the layering of battery unit generation during use, and expect between the operating period, to reach the maximum efficiency for charge-discharge of battery.But this assembling mode by fixing pressure strip, battery being carried out to single compression, is not considered battery fever expansion and problem that the thrust that causes increases in work process, therefore can not ensure battery operated in the state of maximum discharging efficiency.
In order to evade above-mentioned defect, also some are had to carry out the technology of dynamic pressure adjustment to battery component in prior art, the dynamic pressure control program of the battery component that the patent application that such as publication number is CN104541385A provides, the part of control pressurer system is incorporated in the coolant system for battery component, and by transducer Real-time Collection battery unit charging and/or discharge operation during charging and/or discharge rate, the operating parameter such as state of charge or temperature, dynamically change the velocity pressure of the described cooling agent flowed between adjacent cell, temperature, to carry out Dynamic controlling to the pressure being applied to battery unit.This technical scheme needs by repacking coolant system, such as increase limiter and the displacement pump (flowing of limiter constraint cooling agent, displacement pump allows cooling agent one way flow to change the pressure between adjacent cell) or the actuator control type diaphragm that contacts with cooling agent of increase or piston (diaphragm or piston can regulate the pressure being applied to cooling agent, and refrigerating function (or flow velocity) and pressure control function are separated), to be incorporated in the coolant system for battery component by the part of control pressurer system, retrofit process is relatively loaded down with trivial details.
Therefore, be badly in need of a kind of new scheme, can the thrust of dynamic conditioning battery case, ensure the fail safe of battery case, consistency and harmony.
Summary of the invention
One object of the present invention is to provide a kind of battery case, and structure is simple, and without the need to the repacking of complexity, dynamic regulating cell case thrust, under maintenance battery is in most suitable pressure all the time, ensure the fail safe of battery, consistency and harmony, cost of manufacture is low.
Another object of the present invention is a kind of method providing dynamic adjustments battery case thrust, simple and practical, the pressure of the pressure strip of battery case can be changed, under maintenance battery is in most suitable pressure all the time, ensure the fail safe of battery, consistency and harmony.
For solving the problem, the invention provides a kind of battery case, comprising lower box, be arranged on the battery pack in lower box and cover the upper cover on lower box; Also comprise the dynamic hold-down mechanism being arranged on lower box inside and the control system controlling dynamic hold-down mechanism, described dynamic hold-down mechanism is primarily of pressure strip, spring, regulator board, range sensor and motor composition, and pressure strip and regulator board are sequentially laminated on outside battery pack along the battery cell stacked direction of battery pack; Spring and range sensor are all assemblied between pressure strip and regulator board, and the telescopic direction of spring is consistent with the battery cell stacked direction of battery pack; Motor to be arranged on regulator board and to drive regulator board to move along battery cell stacked direction; The signal of control system receiving range transducer CD-ROM drive motor motion.
Further, the rotating shaft of exerting oneself of described motor forms screw pair by leading screw and the feed screw nut be fixed on regulator board and is connected.
Further, the inside of described lower box is provided with the airduct with air inlet and exhaust vent, on the base plate that airduct is welded in lower box and sidewall.
Further, the part that described airduct is welded on lower box base plate extends along battery cell stacked direction, which is provided with uneven exhaust vent, and the exhaust vent density near lower box sidewall is little, and the exhaust vent density away from lower box sidewall is large.
Further, the described airduct part be welded on lower box sidewall is provided with the air inlet of described airduct, and the air inlet of described airduct communicates with the air outlet of the blower fan be fixed on lower box sidewall.
Further, the sidewall of described lower box is also fixed with side position-limiting tube, described side position-limiting tube extends along battery cell stacked direction, be welded between airduct on lower box sidewall and battery pack and be also provided with baffle plate, described side position-limiting tube and the airduct be welded on lower box base plate match with the breach on baffle plate, pressure strip and regulator board, battery pack are compressed.
Further, described battery pack has one at least, each battery pack is all laminated primarily of multi-disc battery cell, battery separator is provided with between adjacent cell monomer, there is the sunk area for holding battery cell at the middle part of described battery separator, both sides and bottom are provided with flanging, jagged on flanging, fix battery cell for coordinating with described airduct and side position-limiting tube.
Further, described spring is multiple, is undertaken spacing by the blind hole on pressure strip and regulator board; And/or described range sensor comprises multiple, and be arranged in the blind hole of pressure strip or regulator board.
Further, described battery separator is heat-conducting metal, or the surface-coated of battery separator has thermostable heat-conductive insulating varnish.
Further, the thermal conducting agent of coating or filling between described battery cell and the contact-making surface of battery separator.
Further, described battery case also comprises multiple battery management unit, and described multiple battery management unit is fixed on a sidewall of lower box, for carrying out real-time monitor and managment to battery pack.
The present invention proposes a kind of method of dynamic adjustments battery case thrust, comprising:
In battery case, compress battery pack with pressure strip along the battery cell stacked direction of battery pack, and in the arranged outside spring of pressure strip, regulator board, range sensor, motor and control system;
Pressure strip Compress Spring under the effect of battery pack fever expansion, and close to regulator board;
Range information between range sensor Real-Time Monitoring pressure strip and regulator board also feeds back to control system;
Control system works according to described range information CD-ROM drive motor;
Motor drives regulator board to move to target location under the driving of control system, and the regulator board of movement pushes back pressure strip to thrust optimum position.
Further, described range sensor is provided with multiple, and control system is averaging processing the distance that multiple range sensor obtains, and works according to average treatment result CD-ROM drive motor.
Further, described method also comprises:
The base plate and sidewall of the inside of described lower box are provided with the airduct with exhaust vent and air inlet, the part that described airduct is welded on lower box base plate extends along described battery cell stacked direction, and be provided with uneven exhaust vent, exhaust vent density near lower box sidewall is little, and the exhaust vent density away from lower box sidewall is large;
Described lower box sidewall installs blower fan, the air inlet of blower fan is communicated with the air inlet of housing, the air outlet of blower fan is communicated with the air inlet of airduct;
Described control system is also according to described range information, when the spacing of pressure strip and regulator board becomes large, strengthen the air intake wind speed of air inlet and the air-out speed of air outlet of blower fan, outside air is made to enter blower fan fast, and pass into described airduct, the heat that the exhaust vent on airduct discharges when battery pack is dried to take away battery pack work.
Compared with prior art, the method of battery case provided by the invention and dynamic adjustments battery case thrust, the dynamic hold-down mechanism primarily of pressure strip, spring, range sensor, regulator board, motor composition is controlled by control system, make the spacing fixing reliable of battery cell, prevent the layering of battery unit generation during use; Battery pack can be ensured all the time at a suitable pressure operation simultaneously, ensure the fail safe of battery case, effectively improve operating efficiency and the useful life of battery pack.Further, battery case provided by the invention is provided with the air cooling system of the airduct composition primarily of blower fan and exhaust vent Density inhomogeneity, can provide support to battery pack and lower the temperature, to improve the stability of dynamic hold-down mechanism adjustment result, reduction is adjusted frequency, ensure the fail safe of battery case, consistency and harmony, enable battery case safe operation under the condition of Large Copacity, high power, high voltage, high current charge-discharge, extend the useful life of battery case.
Accompanying drawing explanation
Fig. 1 is the front perspective view of the battery case of the specific embodiment of the invention;
Fig. 2 is the back side perspective view of the battery case shown in Fig. 1;
Fig. 3 is the structural representation after the removal upper cover of the battery case shown in Fig. 1;
Fig. 4 is the structural representation after the removal upper cover of the battery case shown in Fig. 1 and battery pack;
Fig. 5 is the exploded perspective view of the battery case shown in Fig. 4;
Fig. 6 is the structural representation of the single-cell module of the specific embodiment of the invention;
Fig. 7 is the structural representation of the airduct of the specific embodiment of the invention;
Fig. 8 is the exploded perspective view in a dynamic hold-down mechanism direction of the specific embodiment of the invention;
Fig. 9 is the exploded perspective view in dynamic another direction of hold-down mechanism shown in Fig. 8;
Figure 10 is the method flow diagram of the dynamic adjustments battery case thrust of the specific embodiment of the invention;
In each figure, 1. battery case, 10. upper cover, 101. air outlets, 20. lower boxes, 201. remove case mouth, 202. stepping motor fixing ports, 203. air inlets, 204. airducts, 2041. exhaust vents, 2042. rectangular nibs, 30 battery pack, 301. single-cell module, 3011. battery cells, 3012. battery separators, 40. battery management units, 50. dynamic hold-down mechanisms, 501. pressure strips, 502. springs, 503. range sensors, 504. regulator boards, 505 feed screw nuts, 506 short screw mandrels, 507. stepping motors, 60. blower fans, 70. baffle plates, 80. side position-limiting tubes.
Embodiment
For making object of the present invention, feature becomes apparent, and be further described, but the present invention can realize by different forms, should just not be confined to described embodiment below in conjunction with accompanying drawing to the specific embodiment of the present invention.
Please refer to Fig. 1 to 9, the invention provides a kind of battery case 1, comprising: upper cover 10, lower box 20, battery pack 30, multiple battery management unit 40, dynamically hold-down mechanism 50, two blower fans 60, baffle plate 70, two side position-limiting tubes 80 and control system (not shown).Wherein, upper cover 10 covers on lower box 20, and battery pack 30, multiple battery management unit 40, dynamically hold-down mechanism 50, two blower fans 60, baffle plate 70 and two side position-limiting tubes 80 are installed in the inside of lower box 20.Control system can be an independent current source control system, is arranged on lower box 20 inner, and is electrically connected with dynamic hold-down mechanism 50 and multiple battery management unit 40; Also can be integrated in the master control end of the power equipment based on battery case, be arranged on lower box outside, and still be electrically connected with dynamic hold-down mechanism 50 and multiple battery management unit 40.Multiple battery management unit 40 is fixed on a sidewall of lower box 20, real-time monitor and managment is carried out for electrical parameters such as the voltage to battery pack 30, electric current, temperature, in other embodiments of the invention, also can not battery management unit be set in battery case.
Please refer to Fig. 3 and 6, in the present embodiment, battery pack 30 is made up of multi-disc single-cell module 301 transversely stacking, and each single-cell module 301 is made up of a slice battery cell 3011 and a slice battery separator 3012.There is sunk area at the middle part of battery separator 3012, and for holding battery cell 3011, namely the battery cell stacked direction of battery pack 30 is parallel to the base plate plane of lower box 30, and battery cell 3011 vertically stands on the base plate of lower box 30.In other embodiments of the invention, battery cell 3011 also can lie low along lower box 30 base plate plane, and battery cell stacked direction is perpendicular to the base plate plane of lower box 30.Further, in order to strengthen the heat dispersion of battery cell 3011 and fixing reliability, coating or the thermal conducting agent (not shown) of filling between the contact-making surface of battery cell 3011 and battery separator 3012, this thermal conducting agent thoroughly can get rid of the air between battery cell 3011 and battery separator 3012, reduce thermal resistance, improve heat dispersion, be also conducive to fixing this battery cell 3011 simultaneously, avoid vibrations or impact.This thermal conducting agent can be the viscosity or half stickum that heat conductivility is good, as silica gel.The spacing of above-mentioned this battery cell is fixed reliably, and soaking thermal diffusivity ability is strong, and fail safe is high, can be encapsulated in easy for soft-package battery flexibly in battery pack.
In order in lower box inner support battery pack 30, the two side of battery pack 30 arranges baffle plate 60 and pressure strip 501 respectively, to apply pressure along battery cell stacked direction, support cells group 30, to prevent the layering of battery pack generation during use.It should be noted that, the dispensable assembly of baffle plate 60, in other embodiments of the invention, if the ad hoc support portion having battery pack 30 of the sidewall of lower box 20, or when battery pack 30 can directly be against on lower box 20 sidewall, then can omit the setting of baffle plate 60.
All the time be in most suitable pressure to maintain battery pack between the operating period, reach the efficiency for charge-discharge that battery case is maximum, existing single fixing compression mode to be changed into the compression mode according to real time status dynamic conditioning by dynamic hold-down mechanism 50 by the present invention.As can be seen from figures 8 and 9, dynamic hold-down mechanism 50 is made up of pressure strip 501, four springs 502, two range sensors 503, regulator board 504, feed screw nut 505, short leading screw 506 and stepping motors 507.Pressure strip 501 and regulator board 504 are sequentially laminated on outside battery pack 30 along the battery cell stacked direction of battery pack 30.Spring 502 is contained in the centre of pressure strip 501 and regulator board 504, is undertaken spacing by the blind hole on pressure strip 501 and regulator board 504, and the telescopic direction of spring 502 is consistent with the battery cell stacked direction of battery pack 30.Range sensor 503 is loaded in the blind hole of regulator board 504, can monitor the range information between pressure strip 501 and regulator board 504.Stepping motor 507 is fixedly mounted in the stepping motor fixing port 202 of lower box 20, rotating shaft of exerting oneself is fixedly connected with short screw mandrel 506, short leading screw 506 forms screw pair with the feed screw nut 505 be fixed on regulator board 504 and is connected, thus, regulator board 504 can be driven when stepping motor 507 works to move along battery cell stacked direction, distance between adjustment pressure strip 501 and regulator board 504, changes the pressure that battery pack 30 is born.The signal of control system receiving range transducer 503, and according to range sensor 503 gather pressure strip 501 and regulator board 504 between distance, CD-ROM drive motor is moved, adjustment regulator board 504 is to most suitable position, maintain battery pack 30 and be in most suitable pressure all the time, reach the efficiency for charge-discharge that battery case 1 is maximum.In other execution modes of the present invention, stepping motor 507 also can replace with non-step-type CD-ROM drive motor; Battery pack 30 also can have multiple, and now, a dynamic hold-down mechanism 50 can regulate the pressure of all battery pack 30 simultaneously, and namely pressure strip compresses all battery pack 30; A dynamic hold-down mechanism 50 also only can control the pressure of a battery pack 30, and namely each battery pack 30 is equipped with the dynamic hold-down mechanism 50 of oneself.
Battery case 1 dynamic voltage adjustment mechanism of the present invention is a kind of closed loop regulation and control of Real-time Feedback, and concrete voltage-regulation principle is as follows:
Battery pack 30 work (charge or discharge) time fever expansion, can promote pressure strip 501, pressure strip 501 Compress Spring 502 is also close to regulator board 504, distance between two range sensor 503 Real-Time Monitoring pressure strips 501 and regulator board 504 changes, and the range information detected is fed back to control system in time, control system receives the range information that two range sensors 503 transmit, and the range information that two range sensors 503 obtain is averaging processing, draw the optimum position of regulator board 504, Driving Stepping Motor 507 drives short leading screw 506 to rotate accordingly, and then drive regulator board 504 movements, regulator board 504 moves to and to a certain degree can again push back pressure strip 501, make pressure strip 501 travelling backwards, the distance of whole process middle distance transducer 503 still between Real-Time Monitoring pressure strip 501 and regulator board 504 changes, control system adjusts the drived control to stepping motor 507 in real time according to the feedback of range sensor 503, the distance that finally can control between pressure strip 501 and regulator board 504 is in a suitable value all the time, and then ensure battery all the time at a suitable pressure operation, battery case 30 is made to always work in maximum efficiency for charge-discharge.
If the control overflow precision of battery box system is not high, range sensor 503 also can only arrange one.In the battery box system that some control overflow precision are higher, in order to realize the precise controlling to stepping motor 507 (motor), when design space allows, the range sensor of more than 3 or 3 can be set, just detect the distance between pressure strip 501 and regulator board 504, reduce measure error.
For increasing the heat dispersion of battery case 1, upper cover 10 is provided with air outlet 101; The sidewall of lower box 20 is provided with two air inlets 203, inside is provided with two airducts 204, airduct 204 is welded on the base plate of lower box 20 and the sidewall at air inlet 203 place, both as inner ventilation pipeline, can strengthen again the integral rigidity of lower box 20.
Please refer to Fig. 4, 5, 7, the long limit (being namely welded in the part on lower box 20 base plate) of airduct 204 is provided with uneven exhaust vent 2041, exhaust vent 2041 density near the sidewall at air inlet 203 place is less, exhaust vent 2041 density away from the sidewall at air inlet 203 place is larger, this set contributes to the air quantity of balancing battery case 1 various places inside, the minor face (being namely welded in the part on the sidewall at air inlet 203 place) of airduct 204 is equipped with rectangular nibs 2042, this rectangular nibs 2042 is as the air inlet of airduct 204, communicate with blower fan 60 air outlet on the sidewall being fixed on lower box 20 air inlet 203 place, wherein blower fan 60 is arranged between the minor face of two airducts 204, two rectangular nibs 2042 are arranged in opposite directions, highly different, nibs 2042 one_to_one corresponding rectangular with two is identical respectively for the air outlet of two blower fans 60, air inlet communicates with two air inlet 203 one_to_one corresponding on lower box 20 sidewall respectively.Thus, after outside air enters blower fan 60 from the air inlet 203 of lower box, airduct 204 is entered by two rectangular nibs 2042, battery case 1 is entered again inner from the exhaust vent 2041 the long limit of airduct 204, pass through from battery pack 30 surrounding, finally return to the external world from the air outlet 101 of upper cover 10, take away the heat of release when battery pack 30 works simultaneously.The above-mentioned this air cooling system formed primarily of airduct and blower fan, has good fail safe and good heat dispersion, can ensure battery case safe operation under the condition of Large Copacity, high power, high voltage, high current charge-discharge.
Further, described control system can also according to described range information, when pressure strip 501 becomes large with the spacing of regulator board 504, strengthen the air intake wind speed of air inlet and the air-out speed of air outlet of blower fan 60, outside air is made to enter blower fan 60 fast, and pass into described airduct 204, the heat that exhaust vent 2041 on airduct 204 is dried fast to take away release when battery pack 30 works fast around battery pack 30, obviously, this air cooling system is while providing support to battery pack 30 and lowering the temperature, the stability that dynamic hold-down mechanism 50 adjusts result can also be improved, reduce adjusting frequency of dynamic hold-down mechanism 50, extend the useful life of battery case 1.
Please refer to Fig. 6, in order to further increase the heat dispersion of battery case 1, flanging can be set in the both sides of battery separator 3012 and bottom, to increase area of dissipation; The material of battery separator 3012 can for having the material of higher heat-conductivity, as metal, thus is beneficial to and derived by the heat of battery cell 3011.Further, can also at surface-coated one deck thermostable heat-conductive insulating varnish of battery separator 3012.
In order to strengthen the assembling rigidity of battery case 1 and fixing reliability, two side position-limiting tubes 80 are fixed by screws on the two side (vertical with airduct 204) of lower box 20, two side position-limiting tubes 80 are parallel with the long limit (being welded in the part on the base plate of lower box 20) of two airducts 204, the flanging of battery separator 3012, baffle plate 60, battery separator 3012, pressure strip 501 and regulator board 504 are provided with respectively the breach suitable with the long limit of two side position-limiting tubes 80 and two airducts 204, two side position-limiting tubes 80 together with the long limit of two airducts 204 with baffle plate 60, battery separator 3012, breach on pressure strip 501 and regulator board 504 matches, realize battery pack 30, dynamic hold-down mechanism 50, baffle plate 70, mutual spacing cooperation between two side position-limiting tubes 80 and lower box 20.
In order to reduce the movement of stepping motor 507 (motor) under control of the control system, pressure strip 501, regulator board 504, baffle plate 60 is near the minor face (being namely welded in the part on the sidewall of lower box 20) of airduct 204, pressure strip 501 is positioned on the sidewall of relative lower box 20, thus, while battery cell direction support cells group 30.The wind resistance that reduction pressure strip 501 and regulator board 504 are subject to.
For convenience of carrying, lower box 20 is rectangle box body, and in two opposite side walls, is respectively provided with two removes case mouth 201.
Therefore, battery case of the present invention, by increasing spring, range sensor, regulator board, motor etc. simple assemblies in the outside of existing pressure strip, just can assemble mechanism of dynamic compression man of the present invention easily, structure is simple, without the need to the repacking of complexity, cost of manufacture is low, and can dynamically regulating cell group thrust under control of the control system, maintenance battery pack is effective under being in most suitable pressure all the time, improve the operating efficiency of battery pack, ensure the fail safe of battery case, consistency and harmony simultaneously, increase the service life.Battery case provided by the invention is applicable to the electric automobile etc. of soft-package battery
Please refer to Figure 10, the present invention proposes a kind of method of dynamic adjustments battery case thrust, comprising:
S1, in battery case, compresses battery pack with pressure strip along the battery cell stacked direction of battery pack, and in the arranged outside spring of pressure strip, regulator board, range sensor, motor and control system;
S2, pressure strip Compress Spring under the effect of battery pack fever expansion, and close to regulator board;
S3, the range information between range sensor Real-Time Monitoring pressure strip and regulator board also feeds back to control system;
S4, control system works according to described range information CD-ROM drive motor;
S5, motor drives regulator board to move to target location under the driving of control system, and the regulator board of movement pushes back pressure strip to thrust optimum position.
Please also refer to Fig. 8 and Fig. 9, in step sl, be provided with four springs, 502, two range sensors 503, pressure strip 501 and regulator board 504 are sequentially laminated on outside battery pack 30 along the battery cell stacked direction of battery pack 30.Spring 502 is contained in the centre of pressure strip 501 and regulator board 504, is undertaken spacing by the blind hole on pressure strip 501 and regulator board 504, and the telescopic direction of spring 502 is consistent with the battery cell stacked direction of battery pack 30.Range sensor 503 is loaded in the blind hole of regulator board 504, for monitoring the range information between pressure strip 501 and regulator board 504.Stepping motor 507 is fixedly mounted in the stepping motor fixing port 202 of lower box 20, rotating shaft of exerting oneself is fixedly connected with short screw mandrel 506, short leading screw 506 forms screw pair with the feed screw nut 505 be fixed on regulator board 504 and is connected, thus, regulator board 504 can be driven when stepping motor 507 works to move along battery cell stacked direction, distance between adjustment pressure strip 501 and regulator board 504, changes the pressure that battery pack 30 is born.
In step s 2, meeting fever expansion during battery set charge/discharge, promotes pressure strip and moves, the mobile meeting Compress Spring of pressure strip, thus pressure strip is close to regulator board.
In step s3, the range information between range sensor Real-Time Monitoring pressure strip and regulator board, and range data is fed back to control system.
In step s 4 which, the data that control system receiving range transducer 503 transmits, the distance that multiple range sensor obtains is averaging processing, utilize the result of average treatment to calculate the distance of motor driving regulator board movement or the information such as power, rotating speed, time of motor operations, according to and work according to result of calculation CD-ROM drive motor.
In step s 5, motor movement drives short screw mandrel to rotate, the feed screw nut rotated through on regulator board of short screw mandrel is delivered to regulator board, regulator board moves, Compress Spring, thus push back pressure strip return, in whole process, control system can according to the Real-time Feedback of range sensor, adjust the drived control to motor in time, the distance that finally can control between pressure strip and regulator board is in a suitable value all the time, and then ensure that battery pack works all the time under a suitable thrust, make battery case always work in maximum efficiency for charge-discharge state.
Please also refer to Fig. 4,5,7 further, the method for dynamic adjustments battery case thrust of the present invention also comprises:
The base plate and sidewall of the inside of described lower box are provided with the airduct with exhaust vent and air inlet, the part that described airduct is welded on lower box base plate extends along described battery cell stacked direction, and be provided with uneven exhaust vent, exhaust vent density near lower box sidewall is little, and the exhaust vent density away from lower box sidewall is large;
Described lower box sidewall installs blower fan, the air inlet of blower fan is communicated with the air inlet of housing, the air outlet of blower fan is communicated with the air inlet of airduct;
Described control system is also according to described range information, when the spacing of pressure strip and regulator board becomes large, strengthen the air intake wind speed of air inlet and the air-out speed of air outlet of blower fan, outside air is made to enter blower fan fast, and pass into described airduct, the heat that the exhaust vent on airduct discharges when battery pack is dried to take away battery pack work.
The air cooling system of the composition such as airduct and blower fan can be further advanced by thus, provide support to battery pack and lower the temperature, to improve the stability of dynamic hold-down mechanism adjustment result, reduction is adjusted frequency, ensure the fail safe of battery case, consistency and harmony, enable battery case safe operation under the condition of Large Copacity, high power, high voltage, high current charge-discharge, extend the useful life of battery case.
Obviously, those skilled in the art can carry out various change and modification to invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a battery case, comprises lower box, is layered in the battery pack in lower box and covers the upper cover on lower box, it is characterized in that, also comprises the dynamic hold-down mechanism being arranged on lower box inside and the control system controlling dynamic hold-down mechanism; Described dynamic hold-down mechanism forms primarily of pressure strip, spring, regulator board, range sensor and motor; Pressure strip and regulator board are sequentially laminated on outside battery pack along battery cell stacked direction; Spring and range sensor are all assemblied between pressure strip and regulator board, and the telescopic direction of spring is consistent with battery cell stacked direction; Motor to be arranged on regulator board and to drive regulator board to move along battery cell stacked direction; The signal of control system receiving range transducer CD-ROM drive motor motion.
2. battery case as claimed in claim 1, it is characterized in that, the rotating shaft of exerting oneself of described motor forms screw pair by leading screw and the feed screw nut be fixed on regulator board and is connected.
3. battery case as claimed in claim 1, it is characterized in that, the inside of described lower box is provided with the airduct with exhaust vent and air inlet, on the base plate that airduct is welded in lower box and sidewall.
4. battery case as claimed in claim 3, it is characterized in that, the part that described airduct is welded on lower box base plate extends along battery cell stacked direction, which is provided with uneven exhaust vent, exhaust vent density near lower box sidewall is little, and the exhaust vent density away from lower box sidewall is large.
5. battery case as claimed in claim 3, it is characterized in that, the described airduct part be welded on lower box sidewall is provided with the air inlet of described airduct, and the air inlet of described airduct communicates with the air outlet of the blower fan be fixed on lower box sidewall.
6. the battery case according to any one of claim 3 to 5, it is characterized in that, the sidewall of described lower box is also fixed with side position-limiting tube, described side position-limiting tube extends along battery cell stacked direction, be welded between airduct on lower box sidewall and battery pack and be also provided with baffle plate, described side position-limiting tube and the airduct be welded on lower box base plate match with the breach on baffle plate, pressure strip and regulator board, battery pack are compressed.
7. battery case as claimed in claim 6, it is characterized in that, described battery pack has one at least, each battery pack is all laminated primarily of multi-disc battery cell, is provided with battery separator between adjacent cell monomer, and there is the sunk area for holding battery cell at the middle part of described battery separator, both sides and bottom are provided with flanging, jagged on flanging, for coordinating with described airduct and side position-limiting tube, battery cell is fixed.
8. a method for dynamic adjustments battery case thrust, is characterized in that, comprising:
In battery case, compress battery pack with pressure strip along the battery cell stacked direction of battery pack, and in the arranged outside spring of pressure strip, regulator board, range sensor, motor and control system;
Pressure strip Compress Spring under the effect of battery pack fever expansion, and close to regulator board;
Range information between range sensor Real-Time Monitoring pressure strip and regulator board also feeds back to control system;
Control system works according to described range information CD-ROM drive motor;
Motor drives regulator board to move to target location under the driving of control system, and the regulator board of movement pushes back pressure strip to thrust optimum position.
9. method as claimed in claim 8, it is characterized in that, described range sensor is provided with multiple, and control system is averaging processing the distance that multiple range sensor obtains, and works according to average treatment result CD-ROM drive motor.
10. method as claimed in claim 8 or 9, is characterized in that, also comprise:
The base plate and sidewall of the inside of described lower box are provided with the airduct with exhaust vent and air inlet, the part that described airduct is welded on lower box base plate extends along described battery cell stacked direction, and be provided with uneven exhaust vent, exhaust vent density near lower box sidewall is little, and the exhaust vent density away from lower box sidewall is large;
Described lower box sidewall installs blower fan, the air inlet of blower fan is communicated with the air inlet of housing, the air outlet of blower fan is communicated with the air inlet of airduct;
Described control system is also according to described range information, when the spacing of pressure strip and regulator board becomes large, strengthen the air intake wind speed of air inlet and the air-out speed of air outlet of blower fan, outside air is made to enter blower fan fast, and pass into described airduct, the heat that the exhaust vent on airduct discharges when battery pack is dried to take away battery pack work.
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| CN201510272599.9A CN104979602B (en) | 2015-05-22 | 2015-05-22 | Battery box and method for dynamically adjusting battery box pressing force |
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